Add 404

[ductrl]

You might be recognize through my code that I'm very new to coding, so I'd really appreciate any feedbacks and any way that I can help with the project more! Tysm for the contribution opportunity.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fbc36c8) 3.50% compared to head (4a0350c) 3.50%.

❗ Current head 4a0350c differs from pull request most recent head 14bca90. Consider uploading reports for the commit 14bca90 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##              main     #50   +/-   ##
=======================================
  Coverage     3.50%   3.50%           
  Complexity      31      31           
=======================================
  Files            5       5           
  Lines          114     114           
=======================================
  Hits             4       4           
  Misses         110     110           

Flag	Coverage Δ
unittests	3.50% <ø> (ø)

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[gomzyakov]

@ductrl

Thanks for the work you've done! Keep up the good work!